/*
 * Copyright 2014 Netflix, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.reactivex.netty.ingress;

import io.reactivex.netty.RemoteRxEvent;
import io.reactivex.netty.channel.ObservableConnection;
import rx.Observable;
import rx.functions.Action1;

import java.net.InetSocketAddress;
import java.util.Set;
import java.util.concurrent.atomic.AtomicReference;

public class InetAddressWhiteListIngressPolicy implements IngressPolicy{

	private AtomicReference<Set<String>> whiteList = new AtomicReference<Set<String>>();
	
	InetAddressWhiteListIngressPolicy(Observable<Set<String>> allowedIpAddressesObservable) {
		allowedIpAddressesObservable.subscribe(new Action1<Set<String>>(){
			@Override
			public void call(Set<String> newList) {
				whiteList.set(newList);
			}
		});
	}

	@Override
	public boolean allowed(
			ObservableConnection<RemoteRxEvent, RemoteRxEvent> connection) {
		InetSocketAddress inetSocketAddress 
			= (InetSocketAddress) connection.getChannel().remoteAddress();
		return whiteList.get().contains(inetSocketAddress.getAddress().getHostAddress());
	}
		
}
